Pacific Double-saddle Butterflyfish
(Chaetodon ulietensis)

Description

The common name is “Pacific Double-saddle Butterflyfish” or “Doublesaddle Butterflyfish”.
Maximum size: 15 cm (6 inches).
Origin: Indo-Pacific, including Cocos-Keeling Islands to Tuamoto Islands, north to Japan, and south to New Caledonia and Tonga.
pH Range: 8.0 – 8.5.
Temperature: 23 – 29.3 °C (74 – 82°F). Some sources list a slightly narrower range like 22.2-25.6°C or 24-28°C, or 22-26°C. I will use the broader and most commonly cited range that encompasses the others. Fishbase lists 25-29.3C. Saltcorner lists 23-28C. I will go with a safe range of 23-28°C, which covers most recommendations.
Lifespan: 5-10 years, likely longer.
Swimming Zone: Mid to bottom, often found in coral-rich areas, requires open swimming space and hiding places.
Diet: Omnivore. Feeds on plant and animal material, including small invertebrates, algae, zooplankton, tubeworms, anemones (including Aiptasia), and sometimes clams and corals. They can be difficult to get feeding initially, but accept various prepared frozen and dry foods once acclimated.
Care Level: Moderate. Considered hardy once acclimated.
Temperament: Peaceful towards most other fish, but can be aggressive towards similar species or other butterflyfish in smaller tanks.
Reef Compatibility: Not reef safe. They will nip at and eat soft corals, stony polyps, mushroom corals, anemones (including Aiptasia), tubeworms, and occasionally clams.
Minimum Tank Size: 227-454 Litres (60-120 gallons).. I will use 300L as a good compromise and general recommendation for active swimming fish. Some sources suggest 75 gallons (284L), others 100 gallons (378L), and some even 800L. I will use 300L as a minimum, noting that larger is always better.

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Pacific Double-saddle Butterflyfish: A Striking Addition!

Bring vibrant elegance to your marine aquarium with the stunning Pacific Double-saddle Butterflyfish. Known for its distinct patterns and active nature, it’s a captivating choice for the experienced aquarist.

Overview
This beautiful Butterflyfish (Chaetodon ulietensis) showcases a white body adorned with delicate vertical black lines and two prominent dark saddle-like patches across its back, lending it its common name. Its posterior body, dorsal, and anal fins glow with bright yellow, complemented by a striking black eye band and a spot on the caudal peduncle. Typically seen solitary or in pairs, they are active swimmers that appreciate ample open space within your aquascape.

Care Level
Considered moderately difficult to care for, the Pacific Double-saddle Butterflyfish is hardy once acclimated to a mature system. It generally exhibits a peaceful temperament towards most tankmates but can show aggression towards similar-looking butterflyfish in smaller confines. This species is not reef-safe, as it will nip at and consume corals, anemones, and other invertebrates.

Tank Essentials
A minimum tank size of 300 litres is recommended to provide sufficient swimming space and accommodate its active nature. Ensure your aquarium includes abundant live rock formations for hiding places. Maintain stable water parameters with a pH range of 8.0-8.5 and temperatures between 23-28°C for optimal health.

Diet
The Pacific Double-saddle Butterflyfish is an omnivore. Offer a varied diet of meaty foods like mysis shrimp, chopped clams, and spirulina-enriched flake or pellet foods multiple times daily. They can be initially shy eaters, but usually acclimate well to prepared foods.

Why Buy From Us
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• Scientific Name: Chaetodon ulietensis
• Common Name / Variant: Pacific Double-saddle Butterflyfish
• Maximum Size: 15 cm
• Origin: Indo-Pacific
• pH Range: 8.0–8.5
• Temperature: 23–28°C
• Lifespan: 5–10 years
• Swimming Zone: Mid

Add this striking Pacific Double-saddle Butterflyfish to your marine display today!